Where does National Chain Company rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), National Chain Company ranks #8,449 of 49,997 assignees by granted-patent volume, the same sort as the companies listing and top-holders ranking. See /methodology/#corpus-placement.

How many patents does National Chain Company hold?

National Chain Company holds 38 US utility patents granted between 2015 and 2025, spanning 12 technology areas.

What is National Chain Company's Innovation Score?

National Chain Company has an Innovation Score of 44.4 out of 100 (top 26% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does National Chain Company focus on?

National Chain Company's top technology area is A44C (Personal Adornments, e.g. JEWELLERY; Coins) with 14 patents, ranking #8 of 186 assignees active in that subclass. Grants appear in 12 CPC subclasses total.

Is National Chain Company's patent grant rate increasing or decreasing?

National Chain Company's recent grant velocity is -36% compared to the prior five-year period (grant years, not application filing dates). Grant activity has slowed relative to earlier years.

What does claim depth mean for National Chain Company's patents?

National Chain Company's patents average 8.1 claims each. This is an aggregate descriptive count from the grant record; it does not establish claim scope, legal strength, enforceability, or design-around risk.

How is the National Chain Company patent data sourced?

All patent data comes from USPTO PatentsView, a public research dataset maintained by the United States Patent and Trademark Office covering US granted utility patents from 2015 to 2025.

USPTO 2015–2025 USPTO PatentsView US Corporation

National Chain Company

USPTO PatentsView assignee record - 38 granted patents across 12 technology areas, recorded in grant years 2015–2025. Grant-trend analysis is cross-referenced to USPTO Patent Public Search; it does not measure application filings, current R&D, or legal strength. Primary class: A44C (Personal Adornments, e.g. JEWELLERY; Coins).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, National ranks #8,449 of 49,997 tracked US assignees by granted-patent volume, with 38 patents across 12 technology areas.

#8,449
of 49,997 US assignees by volume: Top 26%
by Innovation Score (44.4/100): 8.1
avg claims per patent: -36%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R8449 · US Corporation #8,449 · 38 grants

GRANTS-SMALL · UPPER-Q · PHOTO-FINISH · CPC-FOCUS · INNOV-PAR · CLAIMS-PAR · TYPE-USCORP · VEL-DOWN · BOOK-FULL

GRANTS-SMALL 38 grants
UPPER-Q #8,449/49,997
PHOTO-FINISH Nalux
CPC-FOCUS A44C · 12 areas
INNOV-PAR 44.4/100
CLAIMS-PAR 8.1 claims/avg
TYPE-USCORP US Corporation
VEL-DOWN -36% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Nalux Co., Ltd. (±0 grants)

Instrument codes from this assignee’s USPTO PatentsView grant sheet: volume band, corpus rank, photo-finish peer, lead CPC, Innovation Score, claim depth, assignee type, velocity, and book completeness. Not a USPTO rating of patent strength.

How National’s 44.4 Innovation Score adds up

The same four weighted components behind every Innovation Score on PlainPatent: portfolio volume, grant velocity, technology breadth, and claim depth.

Volume 12.7 pts (29%) Velocity 14.7 pts (33%) Breadth 12.2 pts (27%) Claim depth 4.9 pts (11%)

Qualcomm Incorporated · highest

85
Crispr Therapeutics · near

44
NantBio · near

44
National Chain · this assignee

44
Nuevolution A/S · near

44
Sunnybrook Health… · near

44
3D Lighting… · lowest

7

What this shows National's Innovation Score is 44.4/100 (top 26% of the PatentsView-derived corpus). The chart places that score against the nearest Innovation Score peers plus corpus poles, not a reprint of the volume ranking.

Does more volume mean deeper claims for National?

Each dot is one of National’s 8 nearest volume peers (same corpus rank neighbourhood as the chart above), placed by total granted patents (horizontal) against average claims per patent (vertical). National’s own 8.1 claims/patent is at or below the 9.9 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

National vs its 8 nearest volume peers: granted patents vs average claims per patent. Source: USPTO PatentsView.

Where National's grants concentrate

National Chain Company is a focused PatentsView assignee: 12 CPC subclasses with 36.8% of grants classified under A44C (Personal Adornments, e.g. JEWELLERY; Coins). Peak complete grant year is 2018 (10 grants) versus a trough of 1 in 2015. By volume, National sits between Nalux Co., Ltd. and Otos Wing Co., Ltd..

National's three-year grant acceleration

National Chain Company shows 11 grants in 2022–2024 against only 5 in 2019–2021. That prior window is too thin for a growth multiple (rename and spin-out assignees look artificially high when the baseline is near zero), so PlainPatent withholds a ranked acceleration claim here.

Nalux

38
National Center O…

38
Nidec Copal

38
Nippon Chemiphar

38
National Steel Car

38
Novimmune

38
Ormat

38
Otos Wing

38
National Chain ◀

38

What this shows National holds 38 patents at rank #8,451, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near National

By rank, the assignees closest to #8,451 in granted patent volume.

Leaders in A44C (Personal Adornments)

Other assignees with the most granted patents in National's primary technology class.

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for National, neither rank-band nor same-CPC leaders (those blocks stay above). In A44C (Personal Adornments), National ranks #8 of 186 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (44 here).

Sunnybrook Health Sciences Centre 44 NantBio, Inc. 44 Nuevolution A/S 44 Crispr Therapeutics AG 44

National's Innovation Score vs. every tracked assignee

Composite of portfolio volume, grant velocity, technology breadth, and claim depth (0–100)

44 Top 26% higher than 74% of 49,997 US assignees

Each bar is a band; taller bars hold more US assignees. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source USPTO PatentsView, PlainPatent Innovation Score · 2015–2025

USPTO utility patent grants by year · 2015–2025

Grants by year

Teal-shaded recent years (2020–present) versus the 2015–2019 baseline. Full figures in the table below.

View data table

National Chain Company patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	1	2.6%
2016	3	7.9%
2017	6	15.8%
2018	10	26.3%
2019	2	5.3%
2020	3	7.9%
2022	3	7.9%
2024	8	21.1%
2025partial year	2	5.3%

Which technologies does National Chain Company patent most?

A44C - Personal Adornments, e.g. JEWELLERY; Coins 14

B32B - Layered Products, i.e. Products Built-up OF Strata OF Flat OR Non-flat, e.g. Cellular OR Honeycomb, Form 3

C22C - Alloys 2

C22F - Changing THE Physical Structure OF Non-ferrous Metals AND Non-ferrous Alloys 2

C21D - Modifying THE Physical Structure OF Ferrous METALS; General Devices FOR Heat Treatment OF Ferrous OR Non-ferrous Metals OR ALLOYS; Making Metal Malleable, e.g. BY Decarburisation OR Tempering 2

B23K - Soldering OR UNSOLDERING; WELDING; Cladding OR Plating BY Soldering OR WELDING; Cutting BY Applying Heat Locally, e.g. Flame CUTTING; Working BY Laser Beam 2

B65D - Containers FOR Storage OR Transport OF Articles OR Materials, e.g. Bags, Barrels, Bottles, Boxes, Cans, Cartons, Crates, Drums, Jars, Tanks, Hoppers, Forwarding CONTAINERS; Accessories, Closures, OR Fittings THEREFOR; Packaging ELEMENTS; Packages 2

B22F - Working Metallic POWDER; Manufacture OF Articles From Metallic POWDER; Making Metallic Powder ; Apparatus OR Devices Specially Adapted FOR Metallic Powder 1

E21B - Earth OR Rock DRILLING; Obtaining OIL, GAS, Water, Soluble OR Meltable Materials OR A Slurry OF Minerals From Wells 1

F16G - Belts, Cables, OR Ropes, Predominantly Used FOR Driving PURPOSES; CHAINS; Fittings Predominantly Used Therefor 1

A44D - Indexing Scheme Relating TO Buttons, Pins, Buckles OR Slide Fasteners, AND TO Jewellery, Bracelets OR Other Personal Adornments 1

B23P - Metal-working NOT Otherwise Provided FOR; Combined OPERATIONS; Universal Machine Tools 1

Top 12 of 12 technology areas

More on this record

Data Source

USPTO PatentsView, US granted patents 2015–2025

View all rankings → How is Innovation Score calculated?

What to do with this data

National Chain Company's patent record in context - here's where to go next.

National Chain Company's lead technology class is A44C (Personal Adornments, e.g. JEWELLERY; Coins), 36.8% of its portfolio - see every assignee active in that class. Explore A44C
Ranked #8,449 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare National Chain Company against Nalux Co., Ltd., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 44.4/100 blends volume, velocity, technology breadth, and claim depth. How it's calculated

Figures reflect USPTO PatentsView grant data through May 2026; pending applications not yet granted are not counted.

Data sourced from USPTO PatentsView - official U.S. government patent data. See our methodology for computation details. Retrieved and formatted by PlainPatent

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the USPTO PatentsView database. Consult a qualified professional before making decisions based on this data.

Read our methodology - how this data is sourced, computed, and verified.

Data sources used on this page

USPTO PatentsView - the disambiguated bulk patent-grant, assignee, and CPC data this page's figures are derived from. patentsview.org
Cooperative Patent Classification (CPC) - the joint USPTO/EPO classification scheme used to group patents by technology area. cooperativepatentclassification.org
USPTO Patent Public Search - the official interface to verify the status of any individual patent. ppubs.uspto.gov

Compiled by PlainPatent , US Patent Intelligence Editorial Process · May 15, 2026

Every figure on PlainPatent is rendered directly from USPTO source data, no number is typed in by an editor. This page draws directly on USPTO source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.